Light-projecting apparatus.



M. DE CRISTOFARO.

LIGHT PHOJECTING APPARATUS.

APPLICATION man MAY n. 1916.

1,280,968. Patented Oct. 8, 1918.

naooao M moLMiL. 6 WW WTOZ 8 72 3% h (It mm i MICHELE DE CRISTOFARO, OF NEW YORK, N. Y.

LIGHT-PROJECTING- APPARATUS.

Specification of Letters Patent.

Patented Oct. 8, 1918.

Original application filed December 4, 1912, Serial No. 734,868. Divided and this application filed May 17, 1916. Serial No. 98,018.

To all whom it may concern:

Be it known that I, MICHELE DE CRIsro- FARO, a subject of the King of Italy, residing at the borough of Manhattan, New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Light-Projecting Apparatus, of which the following is a specification, reference being bad therein to the accompanying drawing.

My invention relates to improvements in picture projecting machines and more particularly has reference to means in combination therewith for shifting a lens in and out of focus, and this application is a division of my pending patent application Serial No. 734,868, filed December 4:, 1912.

Referring to the accompanying drawings, Figure l is a plan view with parts broken away illustrating a lens shifting mechanism applied to part of a picture projecting machine as illustrating an embodiment of my invention, and Fig. 2 is a front elevation of the same.

The lens to be shifted in and out of focus is indicated by the reference character 43, and is carried by the bar 92 which is adapted to slide through the bearing 93 and also through the prongs of the spring-fork 94 which is secured upon the bearing 93 by a screw such as 95 or other suitable means.

The bearing 93 is provided with a threaded shank which passes throu h the bar or rod 96 pivotally mounted at 9 and through which the thumb-screw 98 passes, the lower end of said screw being seated upon the support 99 of the lantern 90, so that upon turning the thumb-screw 98, the lever 96 is elevated upon a pivotal bearing 97 thereby lifting the lens 43 out of focus, and by turning the thumb-screw 98 in the opposite direction the lever 96 will of course drop the,

lens 43 into focus.

From the foregoing it will be seen that by loosening the screw 95 the frictional engagement of the fork 94 upon the rod 92 releases the same and permits of the removal of the lens or any proper adjustment thereof, after which the screw 95 may be driven home, thus pressing in on the top of the spring-fork 9d and causing the prongs thereof to frictionally engage the rod 92.

From the foregoing it will be seen that the lens 43 may be used separately or jointly with other lenses and may be shifted in and out of position and adjusted conveniently for use with any type of lantern adapted for projecting pictures or other matter.

Of course it will be understood that various modifications may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed:

I claim:

1. In combination with a picture projecting machine, a lens, means for supporting and shifting said lens thereupon, said means comprising. a pivoted bar provided with a bearing, a spring-fork adapted to be secured upon said bearing, a rod adapted to support said lens and adapted to penetrate said spring-fork and bearing, means for tensioning said spring-fork upon said lens supporting bar.

2. In combination with a picture projecting machine, a lens, means for supporting and shifting said lens thereupon, said means comprising a pivoted bar provided with a bearing, a spring-forkadapted to be secured upon said bearing, a rod adapted to support said lens and adapted to penetrate said spring-fork and bearing, means for tensioning said spring-fork upon said lens supporting bar, and means in combination therewith for shifting said pivoted bar.

In testimony whereof I hereunto aflix my signature in the presence of two Witnesses.

MICHELE DE CRISTOFARO.

Witnesses:

LOUISE ENDERLE, THoMAs A. HILL.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. C. 

